MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
When the trees are to be planted by the road side the minimum distance from the out edge of side width should be |
| A. | 0.5 to 1 metre |
| B. | 2 to 3 metres |
| C. | 5 to 8 metres |
| D. | 12 to 15 metres |
| E. | None of the above |
| Answer» C. 5 to 8 metres | |
| 102. |
Out of the following diesel engines, the minimum air consumption per BHP will be in |
| A. | 4 stroke mechanical injection |
| B. | 4 stroke air injection |
| C. | 2 stroke mechanical injection pump scavenging |
| D. | 2 stroke air injection |
| E. | None of the above |
| Answer» B. 4 stroke air injection | |
| 103. |
All of the following give Beta and Gamma radiations EXCEPT |
| A. | Iridium 192 |
| B. | Iodine 131 |
| C. | Cobalt 60 |
| D. | Polonium 210 |
| E. | None of the above |
| Answer» E. None of the above | |
| 104. |
Ultra-violet rays are used for the treatment of water known as |
| A. | Dechlorination |
| B. | Disinfection |
| C. | Aeration |
| D. | Filtration |
| E. | Bleaching |
| Answer» C. Aeration | |
| 105. |
While comparing tungsten filament lamps with fluorescent tubes, all of the following are the advantages in favour of tungsten filament lamp EXCEPT |
| A. | Longer life |
| B. | Low cost |
| C. | More brightness |
| D. | Simple installation |
| E. | None of the above |
| Answer» B. Low cost | |
| 106. |
Odours are generally expressed in terms of |
| A. | Hardness number |
| B. | Gravity number |
| C. | Index number |
| D. | Threshold number |
| E. | None of the above |
| Answer» E. None of the above | |
| 107. |
Which of the following is/are renewable sources of energy? |
| A. | Fall or flow of water |
| B. | Sun |
| C. | Wood |
| D. | All of the above |
| E. | Green |
| Answer» E. Green | |
| 108. |
Which of the following industry will usually have the highest concumption of water for processing? |
| A. | Foundry |
| B. | Steel plant |
| C. | Automobile industry |
| D. | Paper mill |
| E. | Aluminium industry |
| Answer» E. Aluminium industry | |
| 109. |
Term REM is used for |
| A. | solar radiation |
| B. | flame photography |
| C. | radiation exposure |
| D. | none of the above |
| E. | None of the above |
| Answer» D. none of the above | |
| 110. |
Ash content of a diesel fuel should not exceed |
| A. | 10% |
| B. | 1% |
| C. | 0.50% |
| D. | 0.01% |
| E. | None of the above |
| Answer» D. 0.01% | |
| 111. |
Alum increases |
| A. | Hardness of water |
| B. | Carbonates of water |
| C. | Sulphates in water |
| D. | Acidity of water |
| E. | None of the above |
| Answer» E. None of the above | |
| 112. |
Electrodialysis is the process of removal of |
| A. | soluble gases in water |
| B. | dissolved solids in water |
| C. | suspended solids in water |
| D. | none of the above |
| E. | None of the above |
| Answer» C. suspended solids in water | |
| 113. |
Identify the incorrect statement if any |
| A. | If the pH value of water is 14 the water has maximum alkalinity |
| B. | pH value of 6 represents acidic water |
| C. | Water having pH value 4 will be more acidic than water having pH value of 6 |
| D. | Maximum acidity of water is indicated by pH value of zero |
| E. | None of the above |
| Answer» E. None of the above | |
| 114. |
The method used for the removal of fine suspended particle is |
| A. | Filtration |
| B. | Agitation |
| C. | Flotation |
| D. | Aeration |
| E. | Screening |
| Answer» B. Agitation | |
| 115. |
Which emission has generally least proportion from a diesel engine as compared to a petrol engine? |
| A. | Oxides of nitrogen |
| B. | Hydrocarbons |
| C. | Carbon monoxide |
| D. | All of the above |
| E. | None of the above |
| Answer» B. Hydrocarbons | |
| 116. |
In power plant an electrostatic precipitators is installed between |
| A. | Forced draft fan and furnace |
| B. | Furnace and chimney |
| C. | Primary air and secondary air |
| D. | Induced draft fan and forced draft fan |
| E. | Air preheater and water treatment plant |
| Answer» C. Primary air and secondary air | |
| 117. |
Which of the following gas can be analysed by chemiluminescence? |
| A. | Ozone |
| B. | Carbon dioxide |
| C. | Nitrogen |
| D. | All of the above |
| E. | None of the above |
| Answer» B. Carbon dioxide | |
| 118. |
Disinfection of water is done by |
| A. | Filtration |
| B. | Alum |
| C. | Ozone |
| D. | Heating and cooling |
| E. | Passing chlorine |
| Answer» F. | |
| 119. |
The rate at which atoms of radioactive sources disintegrate is measured in terms of |
| A. | Cuire |
| B. | Atomic number |
| C. | Wavelength |
| D. | Frequency |
| E. | None of the above |
| Answer» B. Atomic number | |
| 120. |
Which of the following is pesticide? |
| A. | Endrin |
| B. | Aldrin |
| C. | Toxaphone |
| D. | DDT |
| E. | All of the above |
| Answer» F. | |
| 121. |
Which organisms cause infections diseases? |
| A. | Viruses |
| B. | Worms |
| C. | Protozoa |
| D. | Fungi |
| E. | All of the above |
| Answer» F. | |
| 122. |
Permissible noise level in small conference room is |
| A. | 10 to 15 dB |
| B. | 15 to 25 dB |
| C. | 35 to 40 dB |
| D. | 55 to 60 dB |
| E. | None of the above |
| Answer» D. 55 to 60 dB | |
| 123. |
The presence of fluorides in drinking water helps in |
| A. | Purification of water |
| B. | Preventing decaying of teeth |
| C. | Deodourisation of water |
| D. | Reduces fungi formation |
| E. | Killing aerobic bacteria |
| Answer» C. Deodourisation of water | |
| 124. |
Which of the following gas has least proportion in atmospheric air? |
| A. | Argon |
| B. | Carbondioxide |
| C. | Neon |
| D. | Helium |
| E. | None of the above |
| Answer» E. None of the above | |
| 125. |
The maximum concentration of lead in drinking water should not exceed. |
| A. | 0.0005 mg/litre |
| B. | 0.005 mg/litre |
| C. | 0.05 mg/litre |
| D. | 0.5 mg/litre |
| E. | 5 mg/litre |
| Answer» D. 0.5 mg/litre | |
| 126. |
For minimal eye irritation, pH value of swimming pool water should be in the range |
| A. | 6.2 to 6.8 |
| B. | 6.5 to 7.0 |
| C. | 7.0 to 7.2 |
| D. | 7.5 to 7.6 |
| E. | None of the above |
| Answer» E. None of the above | |
| 127. |
BF3 counter can detect which of the following radiations? |
| A. | Alpha particles |
| B. | Neutrons |
| C. | X-rays |
| D. | Beta rays |
| E. | None of the above |
| Answer» C. X-rays | |
| 128. |
The emission of carbon monoxide in automobile exhaust will be low when the vehicle is |
| A. | Idling |
| B. | Cruising at low speed |
| C. | Cruising at high speed |
| D. | Accelerating |
| E. | Decelerating |
| Answer» D. Accelerating | |
| 129. |
Which of the following does not use ambient air for propulsion? |
| A. | Turbo jet |
| B. | Pulse jet |
| C. | Turbo-prop |
| D. | Rocket |
| E. | None of the above |
| Answer» E. None of the above | |
| 130. |
The air consumption of a four stroke diesel engine per rated BHP per hour will be |
| A. | 1 kg |
| B. | 5 to 7 kg |
| C. | 10 to 14 kg |
| D. | 20 kg |
| E. | None of the above |
| Answer» C. 10 to 14 kg | |
| 131. |
The ratio activity of water due to Strontium can be removed by |
| A. | Aeration |
| B. | Alum coagulation |
| C. | Phosphate coagulation |
| D. | Lime |
| E. | Lime - Soda solution |
| Answer» D. Lime | |
| 132. |
Car speed of a lift is usually |
| A. | 0.1 to 0.3 m/s |
| B. | 0.5 to 1 m/s |
| C. | 2 to 5 m/s |
| D. | 7 to 10 m/s |
| E. | None of the above |
| Answer» C. 2 to 5 m/s | |
| 133. |
The discharge of hydrocarbons from automobile exhaust is maximum when the vehicle is |
| A. | Idling |
| B. | Cruising at low speeds |
| C. | Accelerating |
| D. | Decelerating |
| E. | Cruising at high speeds |
| Answer» B. Cruising at low speeds | |
| 134. |
Which of the following symptom is not common between food poisoning and carbon monoxide poisoning? |
| A. | Nausea |
| B. | Vomiting |
| C. | Headache |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 135. |
Which of the following is not a constituent of coal? |
| A. | Hydrogen |
| B. | Nitrogen |
| C. | Inorganic matter |
| D. | Manganese |
| E. | None of the above |
| Answer» E. None of the above | |
| 136. |
The bactericidal, virucidal and cysticidal efficiency of chlorine as a disinfectant |
| A. | increases with a decrease in pH |
| B. | increases with a increase in pH |
| C. | decreases with a decrease in pH |
| D. | decreases with an increase in pH |
| E. | None of the above |
| Answer» B. increases with a increase in pH | |
| 137. |
A blue smoke from a diesel engine indicates presence of |
| A. | Nitrous oxide |
| B. | Carbon dioxide |
| C. | Carbon monoxide |
| D. | Unburnt oil |
| E. | Unburnt carbon |
| Answer» E. Unburnt carbon | |
| 138. |
Lead poisoning occurs when the lead content in water is |
| A. | 300 - 500 ppm |
| B. | 30 - 50 ppm |
| C. | 10 - 15 ppm |
| D. | 3 - 5 ppm |
| E. | 0.3 - 0.5 ppm |
| Answer» F. | |
| 139. |
Which of the following operation produces highest noise level? |
| A. | welding |
| B. | Riveting |
| C. | Machining |
| D. | Pressing |
| E. | None of the above |
| Answer» C. Machining | |
| 140. |
Aeration of water is done for all of the following purposes EXCEPT for |
| A. | removal of bad tastes |
| B. | removal of carbon dioxide |
| C. | increasing the quantity of oxygen in water |
| D. | removal of temporary hardness |
| E. | None of the above |
| Answer» E. None of the above | |
| 141. |
A hard water may contain |
| A. | Calcium carbonate |
| B. | Magnesium sulphate |
| C. | Magnesium bicarbonate |
| D. | Any of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 142. |
The term BOD is associated with pollution arising out of |
| A. | air |
| B. | water |
| C. | noise |
| D. | land |
| E. | None of the above |
| Answer» C. noise | |
| 143. |
Which of the following units measures the memory of the Computer? |
| A. | Volts |
| B. | Amperes |
| C. | Ohms |
| D. | Bits |
| E. | None of these |
| Answer» E. None of these | |
| 144. |
The atmosphere gets heated up mainly by |
| A. | Direct sun-rays |
| B. | Radiation from the earth's surface |
| C. | Heat of the earth's interior |
| D. | Radiogenic heat |
| E. | None of these |
| Answer» C. Heat of the earth's interior | |
| 145. |
Which of the following is the major source of environmental pollution in urban areas? |
| A. | Rolling mills |
| B. | Power plants |
| C. | Automobiles |
| D. | Floor mills |
| E. | Electronic industries |
| Answer» D. Floor mills | |
| 146. |
The total count of bacteria in portable water should not exceed |
| A. | 10,000 per c.c. |
| B. | 5000 per c.c. |
| C. | 998 per c.c. |
| D. | 10 per c.c. |
| E. | 1 mg/litre |
| Answer» E. 1 mg/litre | |
| 147. |
Curies is a measure of |
| A. | biological effect of radiation which a man can sustain |
| B. | the rate at which atoms of radioactive sources disintegrate |
| C. | 86 ergs of energy per gram of air |
| D. | ions percent in an ionised gas |
| E. | None of the above |
| Answer» B. the rate at which atoms of radioactive sources disintegrate | |
| 148. |
Which of the following disease is associated with air pollution? |
| A. | Bronchial asthma |
| B. | Chronic bronchitis |
| C. | Emphysema |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 149. |
The percentage of krypton in atmospheric air is around |
| A. | 0.01 ppm |
| B. | 0.1 ppm |
| C. | 1 ppm |
| D. | 10 ppm |
| E. | None of the above |
| Answer» D. 10 ppm | |
| 150. |
Which of the following acts as ignition accelerator for C.I. engine fuels? |
| A. | Acetone peroxide |
| B. | Hydrogen peroxide |
| C. | Aromatic compounds |
| D. | n-heptane |
| E. | None of the above |
| Answer» B. Hydrogen peroxide | |